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3-time blink (2.5-second OFF)

Upper lamp blinks 3 times - Indoor fan motor issue

Mitsubishi Electric · Air Conditioning

What does 3-time blink (2.5-second OFF) mean?

The upper operation indicator lamp blinks three times with a 2.5-second pause. This error means the rotational frequency feedback signal is not being detected from the indoor fan motor during operation.

Common Causes

  • Indoor fan motor failure
  • Loose connection to the indoor fan motor
  • Faulty motor controller

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Refer to the section 'Check of indoor fan motor'.

  2. 2

    Examine the wiring and connections to the indoor fan motor.

  3. 3

    Replace the indoor fan motor if it is malfunctioning.

Browse all codes in this manual (170)
Verified technical data. Last updated: April 2026

Related Faults

0.5-second ON / 0.5-second OFF blinkUpper lamp blinks 0.5-second ON/OFF - Miswiring or serial signal error00Normal operation - No error codes1 beep during error display mode1 beep during error display mode - Unit has an error (different code)
Source: Mitsubishi Electric Air Conditioning
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